Type-measuring device.



A. H. HALLORAN.

TYPE MEASURING DEVICE.

urmonlox rmzn 001.27, 1ooa.

972,528. I Patented 001. 11,1910.

WITNESSES 2 INVENTOR a p2; v AgyTHUR H. HA:|.0RAN f T'1ORNEY .urrnun n; narrow, or sax rmncrsco, o'nnr'ronma,

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Specification ameraman. Patented Oct. 11, 1910.

application filed October 27, 190,8. Serial No. 458,892. 7 v

To all whom it may concern:

Be it known that I, Anrntm H. HALLORAN, c1t1zen of the United States, residing in the city and county of San Francisco and State of California, have invented new and useful Improvements in Type-Measuring Devices, of which the following is a specifica tion.

This invention relates to a device for the measurement of rectangular areas, and pertains especially to a means for use in measuring type or printed matter.

The particular object of the invention. is to provide a simple, cheap, practical device particularly for use in printing shops and the like, by which the number of ems in a column may be instantly determinech The invention consists essentially of a transparent medium bearing a series of constant product curves, namely, hyperbolas, with rectangular asym totes.

The drawing is a p an of the invention as applied to the measurement of type or printed matter.

A represents a rectangular sheet of suitable transparent material, such as celluloid, on which are inscribed a series of constant product curves 2, namely, hyperbolas, with rectangular asymptotes.

Having reference to the drawing, a: and 3 represented, respectively, by the left-hand edge and top of the sheet A, are the rectangular coordinates, or asymptotes, or reference axes, of the series of hyperbolic curves 2. At any suitable distance parallel with the a: asymptote, here represented by the left-hand edge of the transparent sheet, is drawn a marginal line 3 corresponding to the maximum width of any column to be measured; this marginal line intersecting the several constant product curves 2. These curves 2 intersect the marginal line 3 at uniformdistances apart; that is to say, the several curves being arranged spacially in arithmetical series representing progressively and uniformly increasing areas.

In the application of the device for the use here contemplated, these curves are arranged with respect to the width between the edge and the marginal line 3, so that the product of the coordinates of the various curves shown would be a surface equal to one of the squares formed by the intersections of the adjoining ones of these two sets "of parallel lines. That is to sa if the distance between the edge w and ine 3 is five inches, the maximum width of a column to be measured, and each curve re resents one inch, if there are sixty curves t ere will be sixty square lnches; the first curve of the series at the top corresponding to one square .inch, the second to two square inches, etc.

This spacial arrangement may be indefinitely multiplied, of course, and the interlinear spaces at the points of intersection of the marginal line 3, while uniform, represent multiples of one square inch, or of any other 7 unit of measurement.

To the right of the marginal line 3 are a series of'horizontal lines 4 drawn from the intersections of the various curves with the marglnal line 3, and these horizontal lines are again divided by the column lines 5.

Each of these columns is designated at the top according to a particular size of type, as, for example, 12-p01nt,11-point, l0-po1nt, etc. In each of these columns and op osite each successive curve is shown the num er of ems (or other unit of measurement) according to that particular size of type represented in the square inch, or number of square inches corresponding to the successive curves. That is to say, the topmost curve would show, under 12-point type, thirty-six ems for one square inch; the second curve of the same sized type, or two square inches, would show seventy-two ems; and' so on. Consequently, knowing the size of type in which a column to be measured is printed, the number of ems in the column, or any portion of the column to be measured, is instantly determined by superposing the device on the type, or on the printed matter, so that the w edgeof the device is at the left-hand side of the column, and the y edge of the device at the top of the column; the number of ems in the column being read 0 posits that curve which passes through the ower right-hand edge of the type to be measured.

Having thus described my invention, what 'I claim and desire to secure by Letters Patent is 1. A device for the measurement of type and the like, comprising a sheet bearing a series of constant product curves, namely,

.particulaF'hyperbohc curve, an

spaces, with each space corres each of said spaces showing the number of ems of a particular size of type represented in the areas corresponding to the respective curves. 7

2A device for graphic measurement of smallrectangular areas,comprisin a transparent medium bearin a series 0t constant product curves, namely, hyperbolas, with rectangular asymptotes, said as'ymptotes bein represented, res ectively, by the to and le t-hand edges of t e sheet, a margins. line drawn at a redetermined distance from the left-hand e ge intersecting said curves, a seending to a 1 ries of columns on the sheetat the right of said marginal line,'each column corresponding to la particular size of ty e, and. there being represented in each colgimn and-oppoof that particular size of type in the areas corresponding to the respective curves.

In testimony whereof I have hereunto 'set' my: hand in presence of two subscribing wit site each of said curves the .number of ems 7 

